implemented draft publishing and removed New Posts link/capability

srv/src/cmd/load-test-data/main.go

@@ -93,7 +93,7 @@ func main() {
 
 			logger.Info(ctx, "set post")
 
-			now = now.Add(1 * time.Hour)
+			now = now.Add(-1 * time.Hour)
 		}
 
 	}

srv/src/cmd/mediocre-blog/main.go

@@ -121,11 +121,13 @@ func main() {
 
 	postStore := post.NewStore(postSQLDB)
 	postAssetStore := post.NewAssetStore(postSQLDB)
+	postDraftStore := post.NewDraftStore(postSQLDB)
 
 	httpParams.Logger = logger.WithNamespace("http")
 	httpParams.PowManager = powMgr
 	httpParams.PostStore = postStore
 	httpParams.PostAssetStore = postAssetStore
+	httpParams.PostDraftStore = postDraftStore
 	httpParams.MailingList = ml
 	httpParams.GlobalRoom = chatGlobalRoom
 	httpParams.UserIDCalculator = chatUserIDCalc

srv/src/http/api.go

@@ -37,6 +37,7 @@ type Params struct {
 
 	PostStore      post.Store
 	PostAssetStore post.AssetStore
+	PostDraftStore post.DraftStore
 
 	MailingList mailinglist.MailingList
 
@@ -202,7 +203,7 @@ func (a *api) blogHandler() http.Handler {
 		apiutil.MethodMux(map[string]http.Handler{
 			"GET":     a.renderPostHandler(),
 			"POST":    a.postPostHandler(),
-			"DELETE":  a.deletePostHandler(),
+			"DELETE":  a.deletePostHandler(false),
 			"PREVIEW": a.previewPostHandler(),
 		}),
 	))
@@ -215,8 +216,23 @@ func (a *api) blogHandler() http.Handler {
 		}),
 	))
 
+	mux.Handle("/drafts/", http.StripPrefix("/drafts",
+
+		// everything to do with drafts is protected
+		authMiddleware(a.auther)(
+
+			apiutil.MethodMux(map[string]http.Handler{
+				"GET":     a.renderDraftPostHandler(),
+				"POST":    a.postDraftPostHandler(),
+				"DELETE":  a.deletePostHandler(true),
+				"PREVIEW": a.previewPostHandler(),
+			}),
+		),
+	))
+
 	mux.Handle("/static/", http.FileServer(http.FS(staticFS)))
 	mux.Handle("/follow", a.renderDumbTplHandler("follow.html"))
+	mux.Handle("/admin", a.renderDumbTplHandler("admin.html"))
 	mux.Handle("/mailinglist/unsubscribe", a.renderDumbTplHandler("unsubscribe.html"))
 	mux.Handle("/mailinglist/finalize", a.renderDumbTplHandler("finalize.html"))
 	mux.Handle("/feed.xml", a.renderFeedHandler())

srv/src/http/drafts.go

@@ -0,0 +1,130 @@
+package http
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"path/filepath"
+	"strings"
+
+	"github.com/mediocregopher/blog.mediocregopher.com/srv/http/apiutil"
+	"github.com/mediocregopher/blog.mediocregopher.com/srv/post"
+)
+
+func (a *api) renderDraftPostHandler() http.Handler {
+
+	tpl := a.mustParseBasedTpl("post.html")
+	renderDraftPostsIndexHandler := a.renderDraftPostsIndexHandler()
+	renderDraftEditPostHandler := a.renderEditPostHandler(true)
+
+	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+
+		id := strings.TrimSuffix(filepath.Base(r.URL.Path), ".html")
+
+		if id == "/" {
+			renderDraftPostsIndexHandler.ServeHTTP(rw, r)
+			return
+		}
+
+		if _, ok := r.URL.Query()["edit"]; ok {
+			renderDraftEditPostHandler.ServeHTTP(rw, r)
+			return
+		}
+
+		p, err := a.params.PostDraftStore.GetByID(id)
+
+		if errors.Is(err, post.ErrPostNotFound) {
+			http.Error(rw, "Post not found", 404)
+			return
+		} else if err != nil {
+			apiutil.InternalServerError(
+				rw, r, fmt.Errorf("fetching post with id %q: %w", id, err),
+			)
+			return
+		}
+
+		tplPayload, err := a.postToPostTplPayload(post.StoredPost{Post: p})
+
+		if err != nil {
+			apiutil.InternalServerError(
+				rw, r, fmt.Errorf(
+					"generating template payload for post with id %q: %w",
+					id, err,
+				),
+			)
+			return
+		}
+
+		executeTemplate(rw, r, tpl, tplPayload)
+	})
+}
+
+func (a *api) renderDraftPostsIndexHandler() http.Handler {
+
+	renderEditPostHandler := a.renderEditPostHandler(true)
+	tpl := a.mustParseBasedTpl("draft-posts.html")
+	const pageCount = 20
+
+	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+
+		if _, ok := r.URL.Query()["edit"]; ok {
+			renderEditPostHandler.ServeHTTP(rw, r)
+			return
+		}
+
+		page, err := apiutil.StrToInt(r.FormValue("p"), 0)
+		if err != nil {
+			apiutil.BadRequest(
+				rw, r, fmt.Errorf("invalid page number: %w", err),
+			)
+			return
+		}
+
+		posts, hasMore, err := a.params.PostDraftStore.Get(page, pageCount)
+		if err != nil {
+			apiutil.InternalServerError(
+				rw, r, fmt.Errorf("fetching page %d of posts: %w", page, err),
+			)
+			return
+		}
+
+		tplPayload := struct {
+			Posts              []post.Post
+			PrevPage, NextPage int
+		}{
+			Posts:    posts,
+			PrevPage: -1,
+			NextPage: -1,
+		}
+
+		if page > 0 {
+			tplPayload.PrevPage = page - 1
+		}
+
+		if hasMore {
+			tplPayload.NextPage = page + 1
+		}
+
+		executeTemplate(rw, r, tpl, tplPayload)
+	})
+}
+
+func (a *api) postDraftPostHandler() http.Handler {
+	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+
+		p, err := postFromPostReq(r)
+		if err != nil {
+			apiutil.BadRequest(rw, r, err)
+			return
+		}
+
+		if err := a.params.PostDraftStore.Set(p); err != nil {
+			apiutil.InternalServerError(
+				rw, r, fmt.Errorf("storing post with id %q: %w", p.ID, err),
+			)
+			return
+		}
+
+		a.executeRedirectTpl(rw, r, a.draftURL(p.ID, false)+"?edit")
+	})
+}

srv/src/http/posts.go

@@ -2,6 +2,7 @@ package http
 
 import (
 	"bytes"
+	"context"
 	"errors"
 	"fmt"
 	"html/template"
@@ -16,9 +17,10 @@ import (
 	"github.com/gomarkdown/markdown/parser"
 	"github.com/mediocregopher/blog.mediocregopher.com/srv/http/apiutil"
 	"github.com/mediocregopher/blog.mediocregopher.com/srv/post"
+	"github.com/mediocregopher/mediocre-go-lib/v2/mctx"
 )
 
-func (a *api) parsePostBody(storedPost post.StoredPost) (*txttpl.Template, error) {
+func (a *api) parsePostBody(post post.Post) (*txttpl.Template, error) {
 	tpl := txttpl.New("root")
 	tpl = tpl.Funcs(txttpl.FuncMap(a.tplFuncs()))
 
@@ -43,7 +45,7 @@ func (a *api) parsePostBody(storedPost post.StoredPost) (*txttpl.Template, error
 		},
 	})
 
-	tpl, err := tpl.New(storedPost.ID + "-body.html").Parse(storedPost.Body)
+	tpl, err := tpl.New(post.ID + "-body.html").Parse(post.Body)
 
 	if err != nil {
 		return nil, err
@@ -60,7 +62,7 @@ type postTplPayload struct {
 
 func (a *api) postToPostTplPayload(storedPost post.StoredPost) (postTplPayload, error) {
 
-	bodyTpl, err := a.parsePostBody(storedPost)
+	bodyTpl, err := a.parsePostBody(storedPost.Post)
 	if err != nil {
 		return postTplPayload{}, fmt.Errorf("parsing post body as template: %w", err)
 	}
@@ -125,7 +127,7 @@ func (a *api) renderPostHandler() http.Handler {
 
 	tpl := a.mustParseBasedTpl("post.html")
 	renderPostsIndexHandler := a.renderPostsIndexHandler()
-	renderEditPostHandler := a.renderEditPostHandler()
+	renderEditPostHandler := a.renderEditPostHandler(false)
 
 	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
 
@@ -171,7 +173,7 @@ func (a *api) renderPostHandler() http.Handler {
 
 func (a *api) renderPostsIndexHandler() http.Handler {
 
-	renderEditPostHandler := a.renderEditPostHandler()
+	renderEditPostHandler := a.renderEditPostHandler(false)
 	tpl := a.mustParseBasedTpl("posts.html")
 	const pageCount = 20
 
@@ -219,7 +221,7 @@ func (a *api) renderPostsIndexHandler() http.Handler {
 	})
 }
 
-func (a *api) renderEditPostHandler() http.Handler {
+func (a *api) renderEditPostHandler(isDraft bool) http.Handler {
 
 	tpl := a.mustParseBasedTpl("edit-post.html")
 
@@ -232,7 +234,12 @@ func (a *api) renderEditPostHandler() http.Handler {
 		if id != "/" {
 
 			var err error
-			storedPost, err = a.params.PostStore.GetByID(id)
+
+			if isDraft {
+				storedPost.Post, err = a.params.PostDraftStore.GetByID(id)
+			} else {
+				storedPost, err = a.params.PostStore.GetByID(id)
+			}
 
 			if errors.Is(err, post.ErrPostNotFound) {
 				http.Error(rw, "Post not found", 404)
@@ -243,6 +250,10 @@ func (a *api) renderEditPostHandler() http.Handler {
 				)
 				return
 			}
+
+		} else if !isDraft {
+			http.Error(rw, "Post ID required in URL", 400)
+			return
 		}
 
 		tags, err := a.params.PostStore.GetTags()
@@ -252,11 +263,13 @@ func (a *api) renderEditPostHandler() http.Handler {
 		}
 
 		tplPayload := struct {
-			Post post.StoredPost
-			Tags []string
+			Post    post.StoredPost
+			Tags    []string
+			IsDraft bool
 		}{
-			Post: storedPost,
-			Tags: tags,
+			Post:    storedPost,
+			Tags:    tags,
+			IsDraft: isDraft,
 		}
 
 		executeTemplate(rw, r, tpl, tplPayload)
@@ -289,43 +302,58 @@ func postFromPostReq(r *http.Request) (post.Post, error) {
 	return p, nil
 }
 
+func (a *api) storeAndPublishPost(ctx context.Context, p post.Post) error {
+
+	first, err := a.params.PostStore.Set(p, time.Now())
+
+	if err != nil {
+		return fmt.Errorf("storing post with id %q: %w", p.ID, err)
+	}
+
+	if !first {
+		return nil
+	}
+
+	a.params.Logger.Info(ctx, "publishing blog post to mailing list")
+	urlStr := a.postURL(p.ID, true)
+
+	if err := a.params.MailingList.Publish(p.Title, urlStr); err != nil {
+		return fmt.Errorf("publishing post to mailing list: %w", err)
+	}
+
+	if err := a.params.PostDraftStore.Delete(p.ID); err != nil {
+		return fmt.Errorf("deleting draft: %w", err)
+	}
+
+	return nil
+}
+
 func (a *api) postPostHandler() http.Handler {
 
 	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
 
+		ctx := r.Context()
+
 		p, err := postFromPostReq(r)
 		if err != nil {
 			apiutil.BadRequest(rw, r, err)
 			return
 		}
 
-		first, err := a.params.PostStore.Set(p, time.Now())
+		ctx = mctx.Annotate(ctx, "postID", p.ID)
 
-		if err != nil {
+		if err := a.storeAndPublishPost(ctx, p); err != nil {
 			apiutil.InternalServerError(
-				rw, r, fmt.Errorf("storing post with id %q: %w", p.ID, err),
+				rw, r, fmt.Errorf("storing/publishing post with id %q: %w", p.ID, err),
 			)
 			return
 		}
 
-		if first {
-
-			a.params.Logger.Info(r.Context(), "publishing blog post to mailing list")
-			urlStr := a.postURL(p.ID, true)
-
-			if err := a.params.MailingList.Publish(p.Title, urlStr); err != nil {
-				apiutil.InternalServerError(
-					rw, r, fmt.Errorf("publishing post with id %q: %w", p.ID, err),
-				)
-				return
-			}
-		}
-
-		a.executeRedirectTpl(rw, r, a.postURL(p.ID, false)+"?edit")
+		a.executeRedirectTpl(rw, r, a.postURL(p.ID, false))
 	})
 }
 
-func (a *api) deletePostHandler() http.Handler {
+func (a *api) deletePostHandler(isDraft bool) http.Handler {
 
 	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
 
@@ -336,7 +364,13 @@ func (a *api) deletePostHandler() http.Handler {
 			return
 		}
 
-		err := a.params.PostStore.Delete(id)
+		var err error
+
+		if isDraft {
+			err = a.params.PostDraftStore.Delete(id)
+		} else {
+			err = a.params.PostStore.Delete(id)
+		}
 
 		if errors.Is(err, post.ErrPostNotFound) {
 			http.Error(rw, "Post not found", 404)
@@ -348,8 +382,11 @@ func (a *api) deletePostHandler() http.Handler {
 			return
 		}
 
-		a.executeRedirectTpl(rw, r, a.postsURL(false))
-
+		if isDraft {
+			a.executeRedirectTpl(rw, r, a.draftsURL(false))
+		} else {
+			a.executeRedirectTpl(rw, r, a.postsURL(false))
+		}
 	})
 }
 

srv/src/http/tpl.go

@@ -57,6 +57,15 @@ func (a *api) assetsURL(abs bool) string {
 	return a.blogURL("assets", abs)
 }
 
+func (a *api) draftURL(id string, abs bool) string {
+	path := filepath.Join("drafts", id)
+	return a.blogURL(path, abs)
+}
+
+func (a *api) draftsURL(abs bool) string {
+	return a.blogURL("drafts", abs)
+}
+
 func (a *api) tplFuncs() template.FuncMap {
 	return template.FuncMap{
 		"BlogURL": func(path string) string {
@@ -71,12 +80,15 @@ func (a *api) tplFuncs() template.FuncMap {
 			b, err := staticFS.ReadFile(path)
 			return template.CSS(b), err
 		},
+		"PostURL": func(id string) string {
+			return a.postURL(id, false)
+		},
 		"AssetURL": func(id string) string {
 			path := filepath.Join("assets", id)
 			return a.blogURL(path, false)
 		},
-		"PostURL": func(id string) string {
-			return a.postURL(id, false)
+		"DraftURL": func(id string) string {
+			return a.draftURL(id, false)
 		},
 		"DateTimeFormat": func(t time.Time) string {
 			return t.Format("2006-01-02")

srv/src/http/tpl/admin.html

@@ -0,0 +1,18 @@
+{{ define "body" }}
+
+<h1>Admin</h1>
+
+This is a directory of pages which are used for managing blog content. They are
+mostly left open to inspection, but you will not able to change
+anything without providing credentials.
+
+<ul>
+  <li><a href="{{ BlogURL "posts" }}">Posts</a></li>
+  <li><a href="{{ BlogURL "assets" }}">Assets</a></li>
+  <li><a href="{{ BlogURL "drafts" }}">Drafts (private)</a></li>
+</ul>
+
+{{ end }}
+
+{{ template "base.html" . }}
+

srv/src/http/tpl/assets.html

@@ -1,5 +1,7 @@
 {{ define "body" }}
 
+<h1>Assets</h1>
+
 <h2>Upload Asset</h2>
 
 <p>
@@ -21,6 +23,8 @@
   </div>
 </form>
 
+{{ if gt (len .Payload.IDs) 0 }}
+
 <h2>Existing Assets</h2>
 
 <table>
@@ -44,4 +48,6 @@
 
 {{ end }}
 
+{{ end }}
+
 {{ template "base.html" . }}

srv/src/http/tpl/draft-posts.html

@@ -0,0 +1,48 @@
+{{ define "body" }}
+
+  <h1>Drafts</h1>
+
+  <p>
+    <a href="{{ BlogURL "drafts/" }}?edit">
+      New Draft
+    </a>
+  </p>
+
+  {{ if ge .Payload.PrevPage 0 }}
+  <p>
+    <a href="?p={{ .Payload.PrevPage}}">&lt; &lt; Previous Page</a>
+  </p>
+  {{ end }}
+
+  <table>
+
+    {{ range .Payload.Posts }}
+      <tr>
+        <td><a href="{{ DraftURL .ID }}">{{ .Title }}</a></td>
+        <td>
+          <a href="{{ DraftURL .ID }}?edit">
+            Edit
+          </a>
+        </td>
+        <td>
+          <form
+            action="{{ DraftURL .ID }}?method=delete"
+            method="POST"
+            >
+            <input type="submit" value="Delete" />
+          </form>
+        </td>
+      </tr>
+    {{ end }}
+
+  </table>
+
+  {{ if ge .Payload.NextPage 0 }}
+  <p>
+    <a href="?p={{ .Payload.NextPage}}">Next Page &gt; &gt;</a>
+  </p>
+  {{ end }}
+
+{{ end }}
+
+{{ template "base.html" . }}

srv/src/http/tpl/edit-post.html

@@ -15,6 +15,9 @@
             type="text"
             placeholder="e.g. how-to-fly-a-kite"
             value="{{ .Payload.Post.ID }}" />
+        {{ else if .Payload.IsDraft }}
+        {{ .Payload.Post.ID }}
+        <input name="id" type="hidden" value="{{ .Payload.Post.ID }}" />
         {{ else }}
         <a href="{{ PostURL .Payload.Post.ID }}">{{ .Payload.Post.ID }}</a>
         <input name="id" type="hidden" value="{{ .Payload.Post.ID }}" />
@@ -87,6 +90,7 @@
   </p>
 
   <p>
+
     <input
       type="submit"
       value="Preview"
@@ -94,8 +98,25 @@
       formtarget="_blank"
       />
 
-    {{ if eq .Payload.Post.ID "" }}
-    <input type="submit" value="Publish" formaction="{{ BlogURL "posts/" }}" />
+    {{ if .Payload.IsDraft }}
+    <input type="submit" value="Save" formaction="{{ BlogURL "drafts/" }}" />
+
+
+    <script>
+      function confirmPublish(event) {
+        if (!confirm("Are you sure you're ready to publish?"))
+          event.preventDefault();
+      }
+    </script>
+
+
+    <input
+      type="submit"
+      value="Publish"
+      formaction="{{ BlogURL "posts/" }}"
+      onclick="confirmPublish(event)"
+      />
+
     {{ else }}
     <input type="submit" value="Update" formaction="{{ BlogURL "posts/" }}" />
     {{ end }}
@@ -105,10 +126,17 @@
 </form>
 
 <p>
+  {{ if .Payload.IsDraft }}
+  <a href="{{ BlogURL "drafts/" }}">
+    Back to Drafts
+  </a>
+  {{ else }}
   <a href="{{ BlogURL "posts/" }}">
     Back to Posts
   </a>
+  {{ end }}
 </p>
+
 {{ end }}
 
 {{ template "base.html" . }}

srv/src/http/tpl/posts.html

@@ -1,10 +1,6 @@
 {{ define "body" }}
 
-  <p>
-    <a href="{{ BlogURL "posts/" }}?edit">
-      New Post
-    </a>
-  </p>
+  <h1>Posts</h1>
 
   {{ if ge .Payload.PrevPage 0 }}
   <p>

srv/src/post/draft_post.go

@@ -0,0 +1,187 @@
+package post
+
+import (
+	"database/sql"
+	"encoding/json"
+	"errors"
+	"fmt"
+)
+
+type DraftStore interface {
+
+	// Set sets the draft Post's data into the storage, keyed by the draft
+	// Post's ID.
+	Set(post Post) error
+
+	// Get returns count draft Posts, sorted id descending, offset by the
+	// given page number. The returned boolean indicates if there are more pages
+	// or not.
+	Get(page, count int) ([]Post, bool, error)
+
+	// GetByID will return the draft Post with the given ID, or ErrPostNotFound.
+	GetByID(id string) (Post, error)
+
+	// Delete will delete the draft Post with the given ID.
+	Delete(id string) error
+}
+
+type draftStore struct {
+	db *SQLDB
+}
+
+// NewDraftStore initializes a new DraftStore using an existing SQLDB.
+func NewDraftStore(db *SQLDB) DraftStore {
+	return &draftStore{
+		db: db,
+	}
+}
+
+func (s *draftStore) Set(post Post) error {
+
+	if post.ID == "" {
+		return errors.New("post ID can't be empty")
+	}
+
+	tagsJSON, err := json.Marshal(post.Tags)
+	if err != nil {
+		return fmt.Errorf("json marshaling tags %#v: %w", post.Tags, err)
+	}
+
+	_, err = s.db.db.Exec(
+		`INSERT INTO post_drafts (
+				id, title, description, tags, series, body
+			)
+			VALUES
+			(?, ?, ?, ?, ?, ?)
+			ON CONFLICT (id) DO UPDATE SET
+				title=excluded.title,
+				description=excluded.description,
+				tags=excluded.tags,
+				series=excluded.series,
+				body=excluded.body`,
+		post.ID,
+		post.Title,
+		post.Description,
+		&sql.NullString{String: string(tagsJSON), Valid: len(post.Tags) > 0},
+		&sql.NullString{String: post.Series, Valid: post.Series != ""},
+		post.Body,
+	)
+
+	if err != nil {
+		return fmt.Errorf("inserting into post_drafts: %w", err)
+	}
+
+	return nil
+}
+
+func (s *draftStore) get(
+	querier interface {
+		Query(string, ...interface{}) (*sql.Rows, error)
+	},
+	limit, offset int,
+	where string, whereArgs ...interface{},
+) (
+	[]Post, error,
+) {
+
+	query := `
+		SELECT
+			p.id, p.title, p.description, p.tags, p.series, p.body
+		FROM post_drafts p
+		` + where + `
+		ORDER BY p.id ASC`
+
+	if limit > 0 {
+		query += fmt.Sprintf(" LIMIT %d", limit)
+	}
+
+	if offset > 0 {
+		query += fmt.Sprintf(" OFFSET %d", offset)
+	}
+
+	rows, err := querier.Query(query, whereArgs...)
+
+	if err != nil {
+		return nil, fmt.Errorf("selecting: %w", err)
+	}
+
+	defer rows.Close()
+
+	var posts []Post
+
+	for rows.Next() {
+
+		var (
+			post         Post
+			tags, series sql.NullString
+		)
+
+		err := rows.Scan(
+			&post.ID, &post.Title, &post.Description, &tags, &series,
+			&post.Body,
+		)
+
+		if err != nil {
+			return nil, fmt.Errorf("scanning row: %w", err)
+		}
+
+		post.Series = series.String
+
+		if tags.String != "" {
+
+			if err := json.Unmarshal([]byte(tags.String), &post.Tags); err != nil {
+				return nil, fmt.Errorf("json parsing %q: %w", tags.String, err)
+			}
+		}
+
+		posts = append(posts, post)
+	}
+
+	return posts, nil
+}
+
+func (s *draftStore) Get(page, count int) ([]Post, bool, error) {
+
+	posts, err := s.get(s.db.db, count+1, page*count, ``)
+
+	if err != nil {
+		return nil, false, fmt.Errorf("querying post_drafts: %w", err)
+	}
+
+	var hasMore bool
+
+	if len(posts) > count {
+		hasMore = true
+		posts = posts[:count]
+	}
+
+	return posts, hasMore, nil
+}
+
+func (s *draftStore) GetByID(id string) (Post, error) {
+
+	posts, err := s.get(s.db.db, 0, 0, `WHERE p.id=?`, id)
+
+	if err != nil {
+		return Post{}, fmt.Errorf("querying post_drafts: %w", err)
+	}
+
+	if len(posts) == 0 {
+		return Post{}, ErrPostNotFound
+	}
+
+	if len(posts) > 1 {
+		panic(fmt.Sprintf("got back multiple draft posts querying id %q: %+v", id, posts))
+	}
+
+	return posts[0], nil
+}
+
+func (s *draftStore) Delete(id string) error {
+
+	if _, err := s.db.db.Exec(`DELETE FROM post_drafts WHERE id = ?`, id); err != nil {
+		return fmt.Errorf("deleting from post_drafts: %w", err)
+	}
+
+	return nil
+}

srv/src/post/draft_post_test.go

@@ -0,0 +1,130 @@
+package post
+
+import (
+	"sort"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type draftStoreTestHarness struct {
+	store DraftStore
+}
+
+func newDraftStoreTestHarness(t *testing.T) draftStoreTestHarness {
+
+	db := NewInMemSQLDB()
+	t.Cleanup(func() { db.Close() })
+
+	store := NewDraftStore(db)
+
+	return draftStoreTestHarness{
+		store: store,
+	}
+}
+
+func TestDraftStore(t *testing.T) {
+
+	assertPostEqual := func(t *testing.T, exp, got Post) {
+		t.Helper()
+		sort.Strings(exp.Tags)
+		sort.Strings(got.Tags)
+		assert.Equal(t, exp, got)
+	}
+
+	assertPostsEqual := func(t *testing.T, exp, got []Post) {
+		t.Helper()
+
+		if !assert.Len(t, got, len(exp), "exp:%+v\ngot: %+v", exp, got) {
+			return
+		}
+
+		for i := range exp {
+			assertPostEqual(t, exp[i], got[i])
+		}
+	}
+
+	t.Run("not_found", func(t *testing.T) {
+		h := newDraftStoreTestHarness(t)
+
+		_, err := h.store.GetByID("foo")
+		assert.ErrorIs(t, err, ErrPostNotFound)
+	})
+
+	t.Run("set_get_delete", func(t *testing.T) {
+		h := newDraftStoreTestHarness(t)
+
+		post := testPost(0)
+		post.Tags = []string{"foo", "bar"}
+
+		err := h.store.Set(post)
+		assert.NoError(t, err)
+
+		gotPost, err := h.store.GetByID(post.ID)
+		assert.NoError(t, err)
+
+		assertPostEqual(t, post, gotPost)
+
+		// we will now try updating the post, and ensure it updates properly
+
+		post.Title = "something else"
+		post.Series = "whatever"
+		post.Body = "anything"
+		post.Tags = []string{"bar", "baz"}
+
+		err = h.store.Set(post)
+		assert.NoError(t, err)
+
+		gotPost, err = h.store.GetByID(post.ID)
+		assert.NoError(t, err)
+
+		assertPostEqual(t, post, gotPost)
+
+		// delete the post, it should go away
+		assert.NoError(t, h.store.Delete(post.ID))
+
+		_, err = h.store.GetByID(post.ID)
+		assert.ErrorIs(t, err, ErrPostNotFound)
+	})
+
+	t.Run("get", func(t *testing.T) {
+		h := newDraftStoreTestHarness(t)
+
+		posts := []Post{
+			testPost(0),
+			testPost(1),
+			testPost(2),
+			testPost(3),
+		}
+
+		for _, post := range posts {
+			err := h.store.Set(post)
+			assert.NoError(t, err)
+		}
+
+		gotPosts, hasMore, err := h.store.Get(0, 2)
+		assert.NoError(t, err)
+		assert.True(t, hasMore)
+		assertPostsEqual(t, posts[:2], gotPosts)
+
+		gotPosts, hasMore, err = h.store.Get(1, 2)
+		assert.NoError(t, err)
+		assert.False(t, hasMore)
+		assertPostsEqual(t, posts[2:4], gotPosts)
+
+		posts = append(posts, testPost(4))
+		err = h.store.Set(posts[4])
+		assert.NoError(t, err)
+
+		gotPosts, hasMore, err = h.store.Get(1, 2)
+		assert.NoError(t, err)
+		assert.True(t, hasMore)
+		assertPostsEqual(t, posts[2:4], gotPosts)
+
+		gotPosts, hasMore, err = h.store.Get(2, 2)
+		assert.NoError(t, err)
+		assert.False(t, hasMore)
+		assertPostsEqual(t, posts[4:], gotPosts)
+	})
+
+}

srv/src/post/post.go

@@ -77,44 +77,16 @@ type Store interface {
 }
 
 type store struct {
-	db *sql.DB
+	db *SQLDB
 }
 
 // NewStore initializes a new Store using an existing SQLDB.
 func NewStore(db *SQLDB) Store {
 	return &store{
-		db: db.db,
+		db: db,
 	}
 }
 
-// if the callback returns an error then the transaction is aborted.
-func (s *store) withTx(cb func(*sql.Tx) error) error {
-
-	tx, err := s.db.Begin()
-
-	if err != nil {
-		return fmt.Errorf("starting transaction: %w", err)
-	}
-
-	if err := cb(tx); err != nil {
-
-		if rollbackErr := tx.Rollback(); rollbackErr != nil {
-			return fmt.Errorf(
-				"rolling back transaction: %w (original error: %v)",
-				rollbackErr, err,
-			)
-		}
-
-		return fmt.Errorf("performing transaction: %w (rolled back)", err)
-	}
-
-	if err := tx.Commit(); err != nil {
-		return fmt.Errorf("committing transaction: %w", err)
-	}
-
-	return nil
-}
-
 func (s *store) Set(post Post, now time.Time) (bool, error) {
 
 	if post.ID == "" {
@@ -123,7 +95,7 @@ func (s *store) Set(post Post, now time.Time) (bool, error) {
 
 	var first bool
 
-	err := s.withTx(func(tx *sql.Tx) error {
+	err := s.db.withTx(func(tx *sql.Tx) error {
 
 		nowTS := now.Unix()
 
@@ -270,7 +242,7 @@ func (s *store) get(
 
 func (s *store) Get(page, count int) ([]StoredPost, bool, error) {
 
-	posts, err := s.get(s.db, count+1, page*count, ``)
+	posts, err := s.get(s.db.db, count+1, page*count, ``)
 
 	if err != nil {
 		return nil, false, fmt.Errorf("querying posts: %w", err)
@@ -288,7 +260,7 @@ func (s *store) Get(page, count int) ([]StoredPost, bool, error) {
 
 func (s *store) GetByID(id string) (StoredPost, error) {
 
-	posts, err := s.get(s.db, 0, 0, `WHERE p.id=?`, id)
+	posts, err := s.get(s.db.db, 0, 0, `WHERE p.id=?`, id)
 
 	if err != nil {
 		return StoredPost{}, fmt.Errorf("querying posts: %w", err)
@@ -306,14 +278,14 @@ func (s *store) GetByID(id string) (StoredPost, error) {
 }
 
 func (s *store) GetBySeries(series string) ([]StoredPost, error) {
-	return s.get(s.db, 0, 0, `WHERE p.series=?`, series)
+	return s.get(s.db.db, 0, 0, `WHERE p.series=?`, series)
 }
 
 func (s *store) GetByTag(tag string) ([]StoredPost, error) {
 
 	var posts []StoredPost
 
-	err := s.withTx(func(tx *sql.Tx) error {
+	err := s.db.withTx(func(tx *sql.Tx) error {
 
 		rows, err := tx.Query(`SELECT post_id FROM post_tags WHERE tag = ?`, tag)
 
@@ -357,7 +329,7 @@ func (s *store) GetByTag(tag string) ([]StoredPost, error) {
 
 func (s *store) GetTags() ([]string, error) {
 
-	rows, err := s.db.Query(`SELECT tag FROM post_tags GROUP BY tag`)
+	rows, err := s.db.db.Query(`SELECT tag FROM post_tags GROUP BY tag`)
 	if err != nil {
 		return nil, fmt.Errorf("querying all tags: %w", err)
 	}
@@ -381,23 +353,16 @@ func (s *store) GetTags() ([]string, error) {
 
 func (s *store) Delete(id string) error {
 
-	tx, err := s.db.Begin()
+	return s.db.withTx(func(tx *sql.Tx) error {
 
-	if err != nil {
-		return fmt.Errorf("starting transaction: %w", err)
-	}
+		if _, err := tx.Exec(`DELETE FROM post_tags WHERE post_id = ?`, id); err != nil {
+			return fmt.Errorf("deleting from post_tags: %w", err)
+		}
 
-	if _, err := tx.Exec(`DELETE FROM post_tags WHERE post_id = ?`, id); err != nil {
-		return fmt.Errorf("deleting from post_tags: %w", err)
-	}
+		if _, err := tx.Exec(`DELETE FROM posts WHERE id = ?`, id); err != nil {
+			return fmt.Errorf("deleting from posts: %w", err)
+		}
 
-	if _, err := tx.Exec(`DELETE FROM posts WHERE id = ?`, id); err != nil {
-		return fmt.Errorf("deleting from posts: %w", err)
-	}
-
-	if err := tx.Commit(); err != nil {
-		return fmt.Errorf("committing transaction: %w", err)
-	}
-
-	return nil
+		return nil
+	})
 }

srv/src/post/sql.go

@@ -38,10 +38,18 @@ var migrations = &migrate.MemoryMigrationSource{Migrations: []*migrate.Migration
 				body BLOB NOT NULL
 			)`,
 		},
-		Down: []string{
-			"DROP TABLE assets",
-			"DROP TABLE post_tags",
-			"DROP TABLE posts",
+	},
+	{
+		Id: "2",
+		Up: []string{
+			`CREATE TABLE post_drafts (
+				id          TEXT NOT NULL PRIMARY KEY,
+				title       TEXT NOT NULL,
+				description TEXT NOT NULL,
+				tags        TEXT,
+				series      TEXT,
+				body        TEXT NOT NULL
+			)`,
 		},
 	},
 }}
@@ -89,3 +97,30 @@ func NewInMemSQLDB() *SQLDB {
 func (db *SQLDB) Close() error {
 	return db.db.Close()
 }
+
+func (db *SQLDB) withTx(cb func(*sql.Tx) error) error {
+
+	tx, err := db.db.Begin()
+
+	if err != nil {
+		return fmt.Errorf("starting transaction: %w", err)
+	}
+
+	if err := cb(tx); err != nil {
+
+		if rollbackErr := tx.Rollback(); rollbackErr != nil {
+			return fmt.Errorf(
+				"rolling back transaction: %w (original error: %v)",
+				rollbackErr, err,
+			)
+		}
+
+		return fmt.Errorf("performing transaction: %w (rolled back)", err)
+	}
+
+	if err := tx.Commit(); err != nil {
+		return fmt.Errorf("committing transaction: %w", err)
+	}
+
+	return nil
+}